TABLE 3.
Summary of treatment delivery parameters evaluated for TrueBeam and Halcyon plans for APBI patients.
| Treatment and QA Parameters | TrueBeam VMAT | Halcyon VMAT | p |
|---|---|---|---|
| Total Monitor Units (MU) per fraction | 921 ± 114 (701−1025) | 1188 ± 210 (762−1495) | 0.001 |
| Modulation factor (MF) | 1.77 ± 0.22 (1.35−1.97) | 2.28 ± 0.40 (1.46−2.87) | 0.001 |
| Beam‐on time (min) | 1.68 ± 0.21 (1.27−1.86) | 1.49 ± 0.26 (0.95−1.87) | 0.036 |
| VMAT QA pass rate (%) | 97.85 ± 2.63 (91.5−100) | 99.6 ± 0.39 (98.8−100) | 0.053 |
| Monte Carlo 2nd check pass rate (%) | 99.24 ± 0.43 (98.7−99.9) | 98.6 ± 0.52 (97.9−99.5) | 0.001 |
Note: Statistically significant values are highlighted in bold.